sugarmaker
Member
Thought I'd post the results of my rcbs (mechanical stop) vs dillon (beep) powder cop comparison. Both systems on an LNL-AP.
>>>Mounting: RCBS wins.
RCBS is a screw in die. I have it on its own bushing, pretty simple.
Dillon: Check somewhere, I posted a pic how I got the LNL measure to actuate the dillon case check using the expander stop attachment w/o mods to the press.
>>>Setup / adjustment: RCBS wins on my press if caliber changes, otherwise Dillon is easiest
Dillon: The way I actuate the dillon is pretty simple, but the LNL measure is a PIA to get set for flare and rotor travel, and adding and the dillon compounds the complexity. Once set up it work well, 10 mins is about right. The dillon is super easy to adjust once the measure is working, the notched pushrod and beeper actuator are nice.
RCBS: Fairly easy IF you don't need to change the plunger foot from small to large. The plastic foot pushes onto the plunger so tightly I'm not sure it's ever coming off. Place a properly charged case, adjust until it clicks a little, that's it.
>>Flexibility: Dillon wins, it'll do smaller calibers
The RCBS diesn't do anything smaller than 9mm. The dillon does .22 on up.
>>Accuracy: Dillon by a wide margin
RCBS has a 3.5 grain window (using bullseye in a .357 mag) between over and under charge, for 100% reliable stops. It complains at about a 3 grain window but won't always catch reliably. I'm throwing 3.5 grains, so I've got high at 4 grains and low at .5 grains.
Dillon has a 1.8 grain window under the same conditions.
>>holds adjustment: Jury is out on this one.
The RCBS has a screw out adjustment that is a bit loose in my opinion AND can't be locked, BUT, several hundered rounds and it hasn't moved
Dillon has a screw nut, once set it isn't moving
General notes: These both work well for their intended purpose. If we look at double charges, the 3.5 grain range of the RCBS means it'll catch 1.8 grain nominal settings being double charged to 3.6 grains. The dillon is accurate enough to catch smaller variations in powder charge. When deteting an error, RCBS mimics a misaligned case mouth on the sizer, while the beep of the dillon means only one thing. I have not had a bona-fide charge error yet, but I have had several case mouth hang ups and I'm always paranoid it is a double charge when using the RCBS.
>>>Mounting: RCBS wins.
RCBS is a screw in die. I have it on its own bushing, pretty simple.
Dillon: Check somewhere, I posted a pic how I got the LNL measure to actuate the dillon case check using the expander stop attachment w/o mods to the press.
>>>Setup / adjustment: RCBS wins on my press if caliber changes, otherwise Dillon is easiest
Dillon: The way I actuate the dillon is pretty simple, but the LNL measure is a PIA to get set for flare and rotor travel, and adding and the dillon compounds the complexity. Once set up it work well, 10 mins is about right. The dillon is super easy to adjust once the measure is working, the notched pushrod and beeper actuator are nice.
RCBS: Fairly easy IF you don't need to change the plunger foot from small to large. The plastic foot pushes onto the plunger so tightly I'm not sure it's ever coming off. Place a properly charged case, adjust until it clicks a little, that's it.
>>Flexibility: Dillon wins, it'll do smaller calibers
The RCBS diesn't do anything smaller than 9mm. The dillon does .22 on up.
>>Accuracy: Dillon by a wide margin
RCBS has a 3.5 grain window (using bullseye in a .357 mag) between over and under charge, for 100% reliable stops. It complains at about a 3 grain window but won't always catch reliably. I'm throwing 3.5 grains, so I've got high at 4 grains and low at .5 grains.
Dillon has a 1.8 grain window under the same conditions.
>>holds adjustment: Jury is out on this one.
The RCBS has a screw out adjustment that is a bit loose in my opinion AND can't be locked, BUT, several hundered rounds and it hasn't moved
Dillon has a screw nut, once set it isn't moving
General notes: These both work well for their intended purpose. If we look at double charges, the 3.5 grain range of the RCBS means it'll catch 1.8 grain nominal settings being double charged to 3.6 grains. The dillon is accurate enough to catch smaller variations in powder charge. When deteting an error, RCBS mimics a misaligned case mouth on the sizer, while the beep of the dillon means only one thing. I have not had a bona-fide charge error yet, but I have had several case mouth hang ups and I'm always paranoid it is a double charge when using the RCBS.